Top Guide ID
A handy person from Port St Lucie, FL says:
January 16, 2012
I have been through the entire catalog and cannot find a match for these guides. They are 1/2 wide at the narrow and and the cap is 1" wide
Paul from SWISCO responded:
January 18, 2012
Thank you for posting in our discussion board. The closest match I can find to your sample is our 18-036 Top Sash Guide. Please compare its dimensions to your own hardware and see what you think. I'm not sure if your top hole is necessary or not, but if it is you will need to drill it out.